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Numerical simulation analysis of pile-soil interaction under earthquake action
Yifei Wang1, Zhanfang Huang1,2, Ruixue Hu1
1School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, China.
Plos One
|March 10, 2025
Summary
This study examines how earthquakes affect pile foundations. Results show increased pile axial force and acceleration with higher earthquake magnitudes, impacting foundation stability in liquefaction-prone areas.
Area of Science:
- Geotechnical Engineering
- Earthquake Engineering
- Structural Engineering
Background:
- Pile foundations are critical infrastructure elements susceptible to seismic damage.
- Earthquakes can significantly reduce pile bearing capacity, endangering lives and safety.
- Understanding soil-pile interaction under seismic loads is crucial for resilient design.
Purpose of the Study:
- To investigate the vertical bearing characteristics of piles under seismic actions.
- To analyze the influence of varying earthquake magnitudes on pile behavior and surrounding soil.
- To provide data for improved pile foundation design in seismically active and liquefaction-prone regions.
Main Methods:
- Utilized MIDAS GTS NX finite element software for simulation.
- Studied vertical bearing characteristics of piles under seismic loads.
- Monitored pile acceleration, settlement, axial force, horizontal displacement, and soil pore water pressure.
Main Results:
- Pile top acceleration is significantly greater than pile bottom acceleration (average 20% increase).
- Higher earthquake magnitudes correlate with earlier pore pressure ratio development and increased axial force (up to 40% increase).
- Earthquake magnitude directly influences pile body displacement and pile top settlement.
Conclusions:
- Seismic magnitude is a critical factor affecting pile foundation performance.
- Increased pore water pressure and axial forces under seismic loading necessitate careful design considerations.
- Findings offer valuable insights for engineering construction in liquefaction sites.
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